This is my 1st time trying new maps, and I cannot find the "instructions" to get them to work. I extract the files, put them in the directories ( maps, sound, textures, etc ), but if I do and "OPEN mapname" in command, they load but I cannot get them to start - all I see is the "hit the fire key to start", but it wont. Any help or a point to a good set of instructions would be great.